6kA MCB – 63A 1 Pole C Curve (WMC163C)
£1.84
£2.99
18th Ed. Compliant
2-Year Warranty
UK Stock
Free Delivery £30+
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The WMC163C is a 63 A single-pole 6 kA Miniature Circuit Breaker (MCB) designed for large feed and distribution circuits where inrush currents from motors, welders or transformers demand higher tolerance. Its C-curve tripping profile (5–10 × In) provides robust inrush immunity while ensuring rapid disconnection during short-circuits and overloads....
The WMC163C is a 63 A single-pole 6 kA Miniature Circuit Breaker (MCB) designed for large feed and distribution circuits where inrush currents from motors, welders or transformers demand higher tolerance. Its C-curve tripping profile (5–10 × In) provides robust inrush immunity while ensuring rapid disconnection during short-circuits and overloads.
Fully tested to BS EN 60898, the WMC163C fits all Whitecliffe consumer units and standard DIN-rail enclosures. It delivers 6 kA breaking capacity and 20 000 mechanical operations for long-term performance in domestic, commercial and light-industrial environments.
Installer Tip: Use 63 A C-curve breakers for main feed or distribution circuits where motors and transformers are present. Confirm Zs, voltage drop and cable capacity against BS 7671 limits before commissioning.
- 63 A rated current with C-curve (5–10 × In) tripping characteristic
- 6 kA breaking capacity at 230/400 V AC
- Single-pole design – 18 mm module width
- DIN-rail mounted for consumer units and distribution boards
- Complies with BS EN 60898 and BS 7671 (18th Edition A2)
- Service life – 20 000 mechanical / 8 000 electrical operations
| Part Code | Rating | Curve | Typical Use |
|---|---|---|---|
| WMC150C | 50 A | C | Feed and plant circuits with high inrush |
| WMC163C | 63 A | C | Main feeds and distribution boards |
The WMC163C delivers 6 kA fault protection for main feeds and distribution circuits. For standard resistive loads, choose a B Curve MCB; for added earth-fault protection, use our Type A RCBOs.
Where is a 63 A C Curve MCB used?
Typically on main feeds or distribution circuits supplying large equipment or sub-boards with motors or transformers present.
Is the WMC163C compatible with Whitecliffe boards?
Yes – it fits all Whitecliffe consumer units and standard DIN-rail enclosures.
Can this MCB protect industrial equipment?
Yes, for light-industrial use within a 6 kA fault-level environment. For heavier industrial systems, see our 10 kA range.
What does the C Curve mean?
It trips between 5–10 × In, allowing for motor and transformer inrush without false tripping.
Do you stock D Curve variants?
Yes – Type D (10–20 × In) versions for industrial and transformer circuits are available on request.
- Part Code: WMC163C
- Type: Single Pole MCB
- Rated Current (In): 63 A
- Curve: C (5–10 × In tripping characteristic)
- Rated Voltage (Ue): 230/400 V AC
- Rated Frequency: 50/60 Hz
- Breaking Capacity (Icn): 6 kA
- Insulation Voltage (Ui): 500 V
- Impulse Withstand (Uimp): 4 kV
- Dielectric Test Voltage: 2 kV for 1 minute
- Thermal Reference Temp: 30 °C
- Operating Temperature: –5 °C to +40 °C (avg < 35 °C)
- Mechanical Life: 20 000 operations
- Electrical Life: 8 000 operations
- Mounting: 35 mm DIN rail (1 module width)
- Standards: BS EN 60898; BS 7671:2018 (Amendment 2)
- Typical Applications: Main feeds, distribution boards and plant circuits with high inrush current
Install the WMC163C in a suitable consumer unit or distribution board by a qualified electrician. Ensure the rating and curve type match the circuit design and upstream device.
- Mount securely on 35 mm DIN rail with correct busbar alignment
- Use C-curve for motors, transformers and distribution feeds
- Verify Zs and voltage drop meet BS 7671 limits
- Tighten terminals to manufacturer torque spec and log test results
